Arizona Cardinals running back Rashard Mendenhall (28) during the second half of a preseason NFL football game against the Dallas Cowboys, Saturday, Aug. 17, 2013, in Glendale, Ariz. The Cardinals won 12-7. (AP Photo/Rick Scuteri)

Arizona Cardinals running back Rashard Mendenhall (28) during the second half of a preseason NFL football game against the Dallas Cowboys, Saturday, Aug. 17, 2013, in Glendale, Ariz. The Cardinals won 12-7. (AP Photo/Rick Scuteri)